cons_orbitope.h

Go to the documentation of this file.

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*                                                                           */
/*                  This file is part of the program and library             */
/*         SCIP --- Solving Constraint Integer Programs                      */
/*                                                                           */
/*  Copyright (c) 2002-2026 Zuse Institute Berlin (ZIB)                      */
/*                                                                           */
/*  Licensed under the Apache License, Version 2.0 (the "License");          */
/*  you may not use this file except in compliance with the License.         */
/*  You may obtain a copy of the License at                                  */
/*                                                                           */
/*      http://www.apache.org/licenses/LICENSE-2.0                           */
/*                                                                           */
/*  Unless required by applicable law or agreed to in writing, software      */
/*  distributed under the License is distributed on an "AS IS" BASIS,        */
/*  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
/*  See the License for the specific language governing permissions and      */
/*  limitations under the License.                                           */
/*                                                                           */
/*  You should have received a copy of the Apache-2.0 license                */
/*  along with SCIP; see the file LICENSE. If not visit scipopt.org.         */
/*                                                                           */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
/**@file   cons_orbitope.h
 * @ingroup CONSHDLRS
 * @brief  interface for constraint handlers of type partitioning, packing, and full
 * @author Christopher Hojny
 */
 
/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
 
#ifndef __SCIP_CONS_ORBITOPE_H__
#define __SCIP_CONS_ORBITOPE_H__
 
#include "scip/def.h"
#include "scip/type_cons.h"
#include "scip/type_retcode.h"
#include "scip/type_scip.h"
#include "scip/type_var.h"
#include "symmetry/type_symmetry.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
/** includes orbitope constraint handlers
 *
 *  cons_orbitope serves as an interface for the constraint handlers cons_orbitope_full and cons_orbitope_pp;
 *  this function includes their respective constraint handlers
 */
SCIP_EXPORT
SCIP_RETCODE SCIPincludeConshdlrOrbitope(
   SCIP*                 scip                /**< SCIP data structure */
   );
 
/** creates and captures a orbitope constraint
 *
 *  @note the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
 */
SCIP_EXPORT
SCIP_RETCODE SCIPcreateConsOrbitope(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONS**           cons,               /**< pointer to hold the created constraint */
   const char*           name,               /**< name of constraint */
   SCIP_VAR***           vars,               /**< matrix of variables on which the symmetry acts */
   SCIP_ORBITOPETYPE     orbitopetype,       /**< type of orbitope constraint */
   int                   nrows,              /**< number of rows of variable matrix */
   int                   ncols,              /**< number of columns of variable matrix */
   SCIP_Bool             resolveprop,        /**< should propagation be resolved? */
   SCIP_Bool             ismodelcons,        /**< whether the orbitope is a model constraint */
   SCIP_Bool             checkpporbitope,    /**< Check if full orbitope constraints can be upgraded to pp-orbitopes? */
   SCIP_Bool             initial,            /**< should the LP relaxation of constraint be in the initial LP?
                                              *   Usually set to TRUE. Set to FALSE for 'lazy constraints'. */
   SCIP_Bool             separate,           /**< should the constraint be separated during LP processing?
                                              *   Usually set to TRUE. */
   SCIP_Bool             enforce,            /**< should the constraint be enforced during node processing?
                                              *   TRUE for model constraints, FALSE for additional, redundant constraints. */
   SCIP_Bool             check,              /**< should the constraint be checked for feasibility?
                                              *   TRUE for model constraints, FALSE for additional, redundant constraints. */
   SCIP_Bool             propagate,          /**< should the constraint be propagated during node processing?
                                              *   Usually set to TRUE. */
   SCIP_Bool             local,              /**< is constraint only valid locally?
                                              *   Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints. */
   SCIP_Bool             modifiable,         /**< is constraint modifiable (subject to column generation)?
                                              *   Usually set to FALSE. In column generation applications, set to TRUE if pricing
                                              *   adds coefficients to this constraint. */
   SCIP_Bool             dynamic,            /**< is constraint subject to aging?
                                              *   Usually set to FALSE. Set to TRUE for own cuts which
                                              *   are separated as constraints. */
   SCIP_Bool             removable,          /**< should the relaxation be removed from the LP due to aging or cleanup?
                                              *   Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'. */
   SCIP_Bool             stickingatnode      /**< should the constraint always be kept at the node where it was added, even
                                              *   if it may be moved to a more global node?
                                              *   Usually set to FALSE. Set to TRUE to for constraints that represent node data. */
   );
 
/** creates and captures an orbitope constraint in its most basic variant, i. e., with all constraint flags set to their
 *  default values, which can be set afterwards using SCIPsetConsFLAGNAME()
 *
 *  @see SCIPcreateConsOrbitope() for the default constraint flag configuration
 *
 *  @note the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
 */
SCIP_EXPORT
SCIP_RETCODE SCIPcreateConsBasicOrbitope(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_CONS**           cons,               /**< pointer to hold the created constraint */
   const char*           name,               /**< name of constraint */
   SCIP_VAR***           vars,               /**< matrix of variables on which the symmetry acts */
   SCIP_ORBITOPETYPE     orbitopetype,       /**< type of orbitope constraint */
   int                   nrows,              /**< number of rows of variable matrix */
   int                   ncols,              /**< number of columns of variable matrix */
   SCIP_Bool             resolveprop,        /**< should propagation be resolved? */
   SCIP_Bool             ismodelcons,        /**< whether the orbitope is a model constraint */
   SCIP_Bool             checkpporbitope     /**< Check if full orbitope constraints can be upgraded to pp-orbitopes? */
   );
 
#ifdef __cplusplus
}
#endif
 
#endif